Sewing-machine



(NO Mdel.) 3 Sheets-Sheet 1. R. WHITEHILL.

SEWING MACHINE.

Patentedept. 22, 1885.

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A R. WHITEHILL.

SEWING MACHINE.

No. 326,821. Patented Sept. 22, 1885.

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(No Model.) 3 Sheets-Sheet 3. R. WHITEHILL.

SEWING MAGHINE.

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SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 326,821, datedSeptember 22, 1855.

(No model.)

T0 all wwm t may concern..-

Be it known that I, ROBERT WHITEHILL, of Milwaukee, in the county ofMilwaukee, and in the State of NViseonsin, have invented certain new anduseful Improvements in Sewing-Machines; and I do hereby declare' thatthe following is a full, clear, and exact description thereof.

My invention relates to sewing-machines, and will be fully describedhereinafter.

In the drawings, Figure l is a perspective view of the moving parts of amachine embodying my invention, with the casin g or frame shown indotted lines. Fig. 2 is a vertical longitudinal section through thecenter of the machine. Fig. 3 is a section on line x x of Fig. 2. Fig. 4is a section on line y y of Fig. 2, looking toward the fly-wheel of thechine. Fig. 5 is a section on line ze of Fig. 2.

My improved machine is to be mounted on a stand or table, as machinesusually are.

A is the frame, and B is the diivingshaft. This shaft B carries acam-head, B', on the rear or inner head of which a journal, b, isformed, that the shaft may have a steady bearing in arm A.

C is a take-up lever of bell-crank shape. The elbow of this lever ispivoted tothe upper part of the head of the frame, and its short armcarries a roller (shown in dotted lines of Fig. 2) that engages with thecam-groove b' of the head B',while the long arm has an eye through whichthe upper thread passes on its way from the tension77 to the needle.

Just inside of the rear elbow of the frame Athe driving-shaft B isprovided with a tight collar, D, (see Fig. 2,) that hasacani,D',formedon it, and this is straddled from below by a bracket-lever, D2, (seeFigs. l and 4,) that is pivoted to the rear ofthe casin g by abolt, cl.Each end of the lever D? is provided with a bearing-face, d', and thesefaces are always in contact with the periphery of the cam D', so thatthe faces may be nicely adjusted to the cam. The said lever isslotted,as at d2, and each arm has a reenforce, di, at thebeginning ofthis slot, and these are bored and screwthreaded to receive anadjustingscrew, d, by which the arms may be made to approach each other,the metal being sufficiently elastic to permit this.

Vhile one arm of lever DZ is pivoted tothe frame, as before stated, itsother arm is jointed to a link, D3, that connects the lever DZ with thecrank-arm E of a rock-shaft, E', which latter has its bearing in aswinging bracket, F, that is hung from lugs j' f to the bottom plate,A'. This bracket F has a horizontal arm, F', the outerend of which isbifurcated to receive a roller, F2, and this roller has a screw-bolt, g,projecting up from it into a female set-screw, g', that projects downthrough a threaded opening in the bottom plate, A'.

On its end opposite the arm E the shaft E' is provided with an arm, El,that is slightly curved; and this arm has curved flanges that formbetween them a guide for a roller, h', of an arm, H, that is securedupon or forms part of a shaft, H'. This shaft is journaled inlugs thatdepend one from each end of the frame, and carries two other arms, H2H3, respectively; and to the arms H2 H3 (see Fig. l) the members H andH5, respectively, of afeed-bar are pivoted. A bar, H, connects the twomembers H4 and H5, and the member H5 has the feed-point I secured to itadjnstably by means of a screw, t, that passes through a slot, t', inthe end of said member. The Inember H* carries on its end a roller, c,that projects between cam-ilangcs k' it" of a hollow swinging post,K,whi eh post is suspended by a pivot, L, that depends from the plateA'.

L' is a nut which is secured on the lower end of pivot L, and forms abearing for the lower end of swinging post K.

M is a bifurcated arm that extends from one side of the swinging post,and between the fureations of this arm M is pivoted one end of a link,M', the other end ot' which is pivoted by a stud to the under side ofone end of an anglelever,M2,the other end of which is keyed or otherwisesecured to the lower end of an upright oscillating shaft or post, M3,that has suitable bearings at each of its ends in the rear of the frameA, as shown in Fig. 2 of the drawings. The upper portion of post BP iswidened, and is provided with a slot or opening,m,through which thedriving-shaft passes, and from each side of said slot on one face of thepost are projected arms m' m', that straddle the driving-shaft Bandpartially incloseit be- IOO tween the elbow B4 in the same and the slotin post MJ. The arms mm are inclined or tapered from the post to theirfront ends, so as to lie parallel to the portion of shaft B adjacent tothem, and lie so close to the shaft that the latter is always in contactwith both of them, and therefore as the shaft revolves its elbowedportion o1 crank B4 will have acontinuous and steady swaying action uponthe post, which, continuing through lever M2, link M, and arm M, willimpart a like action to post K.

In addition to arm M, swinging post Khas another arm, N, and to thisarm, arm N of the shuttle-carrier is secured, so that as post K swingsit will move the shuttlecarrier back and forth in the race at the sametime that the lever D2, as it is vibrated by the cam D through themechanism before described, reciprocates the double lever H4 H5, and asthis lever reciprocates, the cam-plates 7c k on post K lift upon themember H4 in time to carry the feedpoint on the end of member H5 upagainst the cloth at each return movement of the member. The shaft H isrocked by means of the flanges h h on arm E2, and the throw of theleverH4 H5 is regulated by means of the screws y y- As the principal strainor wear of swingpost K must be borne by the nut L on bolt L, and as itis absolutely necessary that the swingpost K shall fit snugly betweenthe plate A and the nut L, I divide the threads on the lower end of boltL, so as to leave an annular groove, Z, into which the point of aset-screw, Z, projects, so that after the nut has been turned upsufficiently to take up all the lost motion the set-screw may betightened against Y the bolt to prevent the nut from being turned by thevibration of the machine.

On the driving-shaft B is the usual fly-wheel, R, and on a hub or sleeveof the latter is the sheave or pulley R', and to properly key these tothe driving or needle shaft I propose to bore the ily-wheel end of thelatter to form a socket for a bolt, S, which has an eccentric groove, S,near its inner end, and when it is' in place this eccentric groove liesjust under a short bolt, S2, that passes loosely down through a slot, m,the hub of the fly-wheel and a hole in the needle or driving shaft.

Near its outer end the bolt S is threaded to receive the hub of a millednut, T, and its eX- treme outer end is reduced and threaded to take asmall jam-nut, T', that fits in a depression inthe face of nut T. Thisjam-nut serves to secure nut T tightly on bolt S,so that it cannot turnindependently of bolt S. As shown in Fig. 2, the shallowest portion ofgroove S is uppermost, and therefore the highest portion of theeccentric formed by groove S has wedged the bolt SZ out against theinner periphery of the hub of pulley R', and has made it practicallyintegral with the hub of the flywheel and the needle -or driving shaft,and the two will turn together; but when it is desired to disconnect thesheave from the driving or needle shaft and connect it (the sheave) withthe bobbin Winder the milled nut is turned until the deepest part of theeccentric groove in bolt S comes underthebolt S,when the latter dropsdown out of engagement with the hub ofthe sheave and connection isbroken.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

l.` In a sewing-machine, the combination, with a driving-shaft having acrank or elbow, of a vertical oscillating shaft or post provided witharms embracing said crank or elbow,and having an inclosed opening'through which said driving-shaft passes, pivots for said vertical shaftor post arranged centrally in the vertical plane of the driving-shaft, ashuttlecarrier, and connections between the latter and the saidoscillating shaft or post, substantially as set forth.

2. In a sewing-machine, the combination, with a driving-shaft havingacrank or elbow, of a vertical oscillating shaft or post provided witharms embracing said crank or elbow, and

an arm at its lowerend, and having an in- 4 closed slot or openingthrough which said driving-shaft passes, pivot-pins for said verticalshaft or post arranged centrally in the vertical planevof thedriving-shaft, asecond oscillating shaft or post, a shuttle-carrierconnected therewith, and a link serving as a con` nection between thearms of the said oscillating shaft or post, substantially as set forth.

3. The swing-post K and its cam-flanges, mechanism connecting it withthe drivingshaft, and the feed-bar having a member, one end of whichengages between the cam-fiangcs of swing-post K, in combination with arockshaft, H, the driving-shaft, and connecting mechanism.

4t. The combination of oscillating shaft or post M3 and its arms, theelbowed drivingshaft, lever M2', link M', swing-post K, theshuttlecarrier, cam flanges, feed bar, and mechanism, substantially asdescribed, for re- .ciprocating the feed-bar, all timed to operatesubstantially as described.

5. The combination of the driving-shaft, its rear cam, lever D4,connection D3, rock-shaft E', having flanges h 71., with the swingingand adjustable hanger, rock-shaft H,and the feedbar, as and for thepurpose set forth.

6. The connecting rock-shaft E', its swinging bearing,and mechanism foradjusting said bearing, in combination with the rock-shaft H andfeed-bar, whereby the stroke of the feed-point is regulated, as setforth.

7. The driving-shaft and its cam D, in combination with the lever D4,pivoted at one side thereof to the frame of the machine,and having armsembracing said cam, a link jointed to the other side of said lever, anda feeding mechanism connected with said link, substantially as setforth.

8. The driving-shaft and its cam D', in combination with the slotted orsplit lever D2,

pivoted at one side to the frame of the ma-y ICU IIO

IIS

tical movements to said feedbar, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in 15 the county of Milwaukee and State of Wisconsin, in thepresence of two witnesses.

ROBERT WHITEHILL.

Vitnesses:

S. S. SToUT, H. G. UNDERWooD.

